Pipe cutting and threading machine



2 'SheetS Shet 1,

(NoModeL) L. B. CURTIS.

PIPE CUTTING AND THREADING MACHINE. No. 559,791. Pate May 12, 1896.

I NVENTOR WITNESSES Maw (No Model.) 2 Sheets-Sheet 2 L. B. CURTIS. PIPE CUTTING AND THREADING MACHINE. No. 559,791. Patented May 12,1896.

/e WITNESSES .WASIHNSYBI. DB.

UNITED STATES LEEVIS l3. CURTIS, OF SOUTIIPORT, CONNECTICUT, ASSIGNOR TO CURTIS do CURTIS, OF BRIDGEPORT, CONNECTICUT.

PIPE CUTTING AND THREADING MACHINE.

SPECIFICATION forming part of Letters Patent No. 559,791, dated May 12, 1896.

Application filed January 27, 1896. Serial No. 676,964. (No model.)

To all whom it may concern.- ing and is rotated by a suitable crank {not Be it known that-I, LEWIS l3. CURTIS, a citishown) and revolves the said ring, the teeth zen of the United States, residing at South- 3 of which bear 011 the inner surface of the port, in the county of Fairfield and State of easing. 5 5 5 Connecticut, have invented certain new and The machine illustrated in Figs. 1, 2, and useful Improvements in Pipe Cutting and 3 is of the general type described and claimed Threading Machines; and I do hereby de in United States Patent No. 443,500, granted clarc the following to be a full, clear, and eX- December 30, 1890. In said figures the conact description of the invention, such as will struction shown is one in which a cam-plate to enable others skilled in the art to which it ap- 5 is rotatively adjusted on the ring 2 to adjust pertains to make and use the same. the dies 6 inward or outward, said cam-plate This invention relates to machines for cutbeing secured to the ring 2 in its adjusted poting and threading pipes or rods, and has parsition by thumb-nuts 7. ticular reference to that class of such ma- 8 denotes a rod mounted to slide freely in 15 chines in which a rotary die-carrying ring is the rim of the casing and having a finger 9 supported in a surrounding casing with the at one end extending inward over the edge toothed exterior of the ring bearing on the of the ring 2, and having an opening at the interior of the casing. In such machines the other end to receive the cam-shaped portion wear of the crowns of the teeth and the bear- 10 of the lever 11; fulcrumed on the casing, 2o ing-surface of the casing will eventually imwhereby the die-ring may be moved rearpair the eiiiciency of the machine; and the ward, substantially as shown and for the purprincipal object of this invention is the propose described in the aforesaid patent. duction of a pipe cutting and threading ma- 12 denotes the vise-jaws, and 13 the operchine of this type which will practically perating-screw therefor, the details of which are 7 5 2 5 mit of the taking up of the wear at these well understood by those skilled in the art.

points. Referring to Figs. 4 and 5,11 denotes two A further object of the invention is to disguide-rods projecting at the rear of the easpense with the lead blocks and lead screw ing and entering guide-openings in a rectaninside the casing and to feed the pipe or rod gular frame 15, in which the vise-jaws 12 are 30 being threaded by means of the vise-jaws, adapted to slide and be moved toward and thus permitting of reduction in the length of from each other by a right and left hand the casing. threaded rod 16, having hand-wheel 16. To these ends the invention consists in The lower end of the frame 15 is provided the construction and combination of parts with horizontal rack-bars 15, which are en- 5 substantially as hereinafter described and gaged by pinions 17 on a shaft 17 mounted claimed. in bearings at the base of the casing, and Inthe drawings which accompany and form having a wheel 18 at one end, by means of part of this specification, Figure 1 represents which the shaft and pinions can be rotated a front elevation of a machine embodying the to feed the frame 15 and the vise-jaws 12 to- 0 4o invention. Fig. 2 is a plan view, partly ward and from the rear of the casing. The broken out, on the line a: as of Fig. 1. Fig. 3 wheel 18 is provided with holes 18 to receive is a side elevation from the left of Fig. 1. a hand-lever. The opening in the frame 15 Figs. 4: and 5 are respectively side and rear for one of the rods let is elongated to form a elevations of a different form of machine emslot, as at 19, for a purpose presently ex- 45 bodying certain additional features of invenplained. In this construction the feed of tion. the work to be operated upon is obtained by Similar reference -characters are used to the horizontal movement of the vise-jaws by designate the same parts in the several views. rotating the pinion-shaft 17.

1 denotes the casing, and 2 the die-carrying In both forms of threaders shown the cas- :00 50 ring, having circumferential teeth 3 engaged ing is recessed at the under side, as at 20, by the pinion 4, which is journaled in the casbetween the lugs or feet 21, by means of which and bolts 22 the device is secured to a suitable bench or support. At or about the center of this recess the casing is divided from edge to edge, as at 23, and a screw-bolt 24: extends horizontally through the feet and across the recess 20, said screw-bolt having a nut and a head or two nuts, as at 25, by means of which the feet can be drawn toward each other to reduce the width of the split 23, and thereby take up the Wear of the casing 1 and ring-teeth 3. In one or both of the feet 21 the holes through which the bolts 22 pass are elongated to form slots 26, the purpose being to enable the casing to be contracted, as just described, without disturbing the attaching-bolts by which the machine is secured to its support.

In the construction shown in Fig. 5 the movement of the feet toward each other would also draw the guide-rods 14: somewhat in the same direction. To prevent the frame 15 from then binding, one of the openings for the guide-rods is elongated, as at 19.

Machines of this type have been constructed with an opening or slit in the casing nearits upper portion and with a lug at each side of said slit or opening, through whichatightening-bolt passes. It thus requires a special construction, since the ca sing of an old form of threader, which has no opening or lugs, does not contain stock enough to permit the riveting of lugs thereto. Such old machines,

having no means of adjustment, may be so altered or reconstructed in accordance with this present invention as to give them all the advantages possessed by the machines before mentioned having lugs and adjustingbolts.

Having now described the invention, what I claim is 1. A pipe-threader comprising in its construction a die-carrying ring, a casing therefor having attaching-feet and divided from edge to edge between said feet, and means for adjustably securing said feet to a bench or support.

2. The combination with the die-carrying ring 2, of the casing 1 having attaching-feet 21 the bolt-holes of one of which are slotted, the said casing being divided or split from edge to edge between said feet, and the screwbolt 24: passing horizontally through the feet.

3. The combination with a casing divided or split from edge to edge, substantially as shown and having the guide-rods 14, of the rectangular frame 1-5l1-aving openings for the rods 14, one of said openings being elongated, said frame also having racks 15 and carrying adjustable vise-jaws, and the shaft 17 having pinions 17 meshing with said racks.

l. The combination. with the casin g 1 having the guide-rods 14 and the feet 21 and split between said feet, of the rectangular frame 15 having racks 15 and carrying the vise-jaws, the shaft 17 having pinions 1T meshing with said racks, and the screw-bolt 21 passing horizontally through the feet, the opening in the frame 15 for one of the rods 1% being elongated substantially as and for the purpose described.

5. A pipe cutting and threading machine having a die-carrying ring, a casing having attaching-feet and divided or split between said feet and means for drawing said feet together.

In testimony whereof I affix my signature in presence of two witnesses.

LEWIS B. CURTIS. \Vi'tnesses A. M. Woosrnn, S. V. RICHARDSON. 

